Original 1st printing 13&3/4 x 21" concert poster for ex-Lovin' Spoonful leader John Sebastian appearing with Poco on 4/12/1970 and Frank Zappa (and the Hot Rats) appearing with Boz Scaggs on 4/19/1970, both shows promoted by Bill Graham Presents and held at the Berkeley Community Theatre in Berkeley, CA.

 Medium-thick semi-gloss coated index stock poster is in very good to excellent (B/B+ to B+) condition; there is a very thin horizontal crease/bend and a tiny tear in the upper right margin (with another very soft bend right underneath), along with a touch of curl to the paper, a few light surface scuffs/pin-prick spots here and there, a tiny bend in the upper left corner tip, 

 Very sharp late-1970 Bill Graham Presents poster from Berkeley.